A body is initially at rest. It undergoes one dimensional motion with constant acceleration. The power delivered to it at time t is proportional to

Explanation

(ii) t
As body is initially at rest , u = 0
As ` v =u +at`
v = at
P = Power = Fv = (ma) at ` = ma^(2)t `
As m and a are constants
Therefore , `P prop t `